Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/80-18 | 120/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.3 (617.2) | 24.61 (625.2) | 0.31 (8) 1.3% |
| Width inches (mm) | 3.94 (100) | 4.72 (120) | 0.79 (20) 20% |
| Circum. inches (mm) | 76.34 (1938.99) | 77.33 (1964.12) | 0.99 (25.13) 1.3% |
| Sidewall Height inches (mm) | 3.15 (80) | 3.31 (84) | 0.16 (4) 5% |
| Revolutions per mile (km) | 829.99 (515.73) | 819.37 (509.13) | -10.62 (-6.6) -1.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.26 mph (32.6 km/h) |
| 25 mph (40.23 km/h) | 25.32 mph (40.76 km/h) |
| 30 mph (48.28 km/h) | 30.39 mph (48.91 km/h) |
| 35 mph (56.33 km/h) | 35.45 mph (57.06 km/h) |
| 40 mph (64.37 km/h) | 40.52 mph (65.21 km/h) |
| 45 mph (72.42 km/h) | 45.58 mph (73.36 km/h) |
| 50 mph (80.47 km/h) | 50.65 mph (81.51 km/h) |
| 55 mph (88.51 km/h) | 55.71 mph (89.66 km/h) |
| 60 mph (96.56 km/h) | 60.78 mph (97.81 km/h) |
| 65 mph (104.61 km/h) | 65.84 mph (105.96 km/h) |
| 70 mph (112.65 km/h) | 70.91 mph (114.11 km/h) |
| 75 mph (120.7 km/h) | 75.97 mph (122.27 km/h) |
| 80 mph (128.75 km/h) | 81.04 mph (130.42 km/h) |
| 85 mph (136.79 km/h) | 86.1 mph (138.57 km/h) |
| 90 mph (144.84 km/h) | 91.17 mph (146.72 km/h) |
| 95 mph (152.89 km/h) | 96.23 mph (154.87 km/h) |
| 100 mph (160.93 km/h) | 101.3 mph (163.02 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2085 | 2422 | 2609 | 2724 | 2848 | 2937 | 3035 | 3150 | 3310 | 3469 | 3647 | 3789 | 4046 | 4330 | 4552 | 4694 | 4774 | 5066 | 5475 | 6362 |
Better Fuel Economy Factory Ratios Increased Power
